GB1382094A - Method of maintaining the required shape of a structure - Google Patents

Method of maintaining the required shape of a structure

Info

Publication number
GB1382094A
GB1382094A GB1709872A GB1709872A GB1382094A GB 1382094 A GB1382094 A GB 1382094A GB 1709872 A GB1709872 A GB 1709872A GB 1709872 A GB1709872 A GB 1709872A GB 1382094 A GB1382094 A GB 1382094A
Authority
GB
United Kingdom
Prior art keywords
actuators
control device
operating conditions
changes
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1709872A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB1709872A priority Critical patent/GB1382094A/en
Publication of GB1382094A publication Critical patent/GB1382094A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/147—Reflecting surfaces; Equivalent structures provided with means for controlling or monitoring the shape of the reflecting surface

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

1382094 Aerials H C HUSBAND 6 June 1973 [13 April 1972] 17098/72 Heading H4A In order to maintain the required shape of a radio reflector or like structure during use in spite of varying deforming forces caused by changes in the operating conditions, measurements of such changes are made and are applied to a control means which is arranged to develop from a storage means a plurality of control signals for application to actuators which produce mutual displacements between portions of the structure in compensation If the distortions caused by said forces. The storage means develops said displacements from previously measured values of the distortions produced by various conditions of operation. An aerial assembly 1 has a large reflector comprising sheets 2 of suitable reflective material which are mounted on individual frames 3. Each of said frames is supported from a main framework 4 through the intermediary of a plurality of actuators 5. The framework 4 comprises a circular rim 4a, arms 4b, and a hub 4c. The aerial assembly 1 has a mounting 6, which provides for its rotation in azimuth and in elevation. Signals corresponding to the rotational displacements of the aerial assembly are transmitted over a link 7 to a control device 8, which is also fed with signals corresponding to wind speed and direction (devices 9, 10), temperatures of different parts of the structure (devices 11, 12) and air temperature and barometric pressure (devices T, P). The control device 8 provides output signals for controlling each of the actuators 5 to reduce or eliminate distortion of the reflective surface caused by changes in the monitored operating conditions. The actuators 5 may be in the form of hydraulic jacks, and they may be operated in stepped manner by pulsed output signals. The control device 8 may comprise analogue computing means or may alternatively comprise a programmed computer in which each programme corresponds to a different set of operating conditions.
GB1709872A 1972-04-13 1972-04-13 Method of maintaining the required shape of a structure Expired GB1382094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1709872A GB1382094A (en) 1972-04-13 1972-04-13 Method of maintaining the required shape of a structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1709872A GB1382094A (en) 1972-04-13 1972-04-13 Method of maintaining the required shape of a structure

Publications (1)

Publication Number Publication Date
GB1382094A true GB1382094A (en) 1975-01-29

Family

ID=10089216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1709872A Expired GB1382094A (en) 1972-04-13 1972-04-13 Method of maintaining the required shape of a structure

Country Status (1)

Country Link
GB (1) GB1382094A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523375A1 (en) * 1982-03-10 1983-09-16 Europ Agence Spatiale REFLECTOR DISTORTION COMPENSATION DEVICE FOR MULTI-BEAM WAVES RECEIVING AND / OR TRANSMITTING ANTENNAS
US4484198A (en) * 1981-04-03 1984-11-20 Thomson-Csf Antenna support system with two dimension flexibility
EP0331248A1 (en) * 1988-03-03 1989-09-06 Hollandse Signaalapparaten B.V. Antenna system with adjustable beam width and beam orientation
US5200758A (en) * 1989-10-05 1993-04-06 Lockheed Missiles & Space Company, Inc. System for controlling the radiation pattern of an antenna
FR2732081A1 (en) * 1995-03-24 1996-09-27 Giat Ind Sa JACK SUPPORTING HEAVY AND FRAGILE STRUCTURES, SUCH AS A TELESCOPE MIRROR
FR2838872A1 (en) * 2002-04-22 2003-10-24 Mitsubishi Electric Corp Parallel displacement/inclination measuring apparatus for antenna systems, has one portion for calculating positions of two markers and another portion for calculating displacement and inclination based on marker positions
FR2839585A1 (en) * 2002-04-12 2003-11-14 Mitsubishi Electric Corp ANTENNA DEVICE CAPABLE OF MEASURING AND COMPENSATING DEFORMATION AND MOVEMENT OF SAID DEVICE

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484198A (en) * 1981-04-03 1984-11-20 Thomson-Csf Antenna support system with two dimension flexibility
FR2523375A1 (en) * 1982-03-10 1983-09-16 Europ Agence Spatiale REFLECTOR DISTORTION COMPENSATION DEVICE FOR MULTI-BEAM WAVES RECEIVING AND / OR TRANSMITTING ANTENNAS
EP0331248A1 (en) * 1988-03-03 1989-09-06 Hollandse Signaalapparaten B.V. Antenna system with adjustable beam width and beam orientation
US5200758A (en) * 1989-10-05 1993-04-06 Lockheed Missiles & Space Company, Inc. System for controlling the radiation pattern of an antenna
FR2732081A1 (en) * 1995-03-24 1996-09-27 Giat Ind Sa JACK SUPPORTING HEAVY AND FRAGILE STRUCTURES, SUCH AS A TELESCOPE MIRROR
WO1996030965A1 (en) * 1995-03-24 1996-10-03 Giat Industries Support cylinder for fragile and heavy structures, such as telescope mirrors
US5907441A (en) * 1995-03-24 1999-05-25 Giat Industries Support jack for fragile heavy structures
FR2839585A1 (en) * 2002-04-12 2003-11-14 Mitsubishi Electric Corp ANTENNA DEVICE CAPABLE OF MEASURING AND COMPENSATING DEFORMATION AND MOVEMENT OF SAID DEVICE
US6933904B2 (en) 2002-04-12 2005-08-23 Mitsubishi Denki Kabushiki Kaisha Antenna apparatus
DE10316834B4 (en) * 2002-04-12 2010-07-08 Mitsubishi Denki K.K. antenna device
FR2838872A1 (en) * 2002-04-22 2003-10-24 Mitsubishi Electric Corp Parallel displacement/inclination measuring apparatus for antenna systems, has one portion for calculating positions of two markers and another portion for calculating displacement and inclination based on marker positions

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees